5 files changed, 121 insertions, 0 deletions
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig
index a6d48e8a66..f2524c18b7 100644
--- a/drivers/sysreset/Kconfig
+++ b/drivers/sysreset/Kconfig
@@ -15,6 +15,20 @@ config SYSRESET
 
 if SYSRESET
 
+config SYSRESET_GPIO
+	bool "Enable support for GPIO reset driver"
+	select GPIO
+	help
+	  Reset support via GPIO pin connected reset logic. This is used for
+	  example on Microblaze where reset logic can be controlled via GPIO
+	  pin which triggers cpu reset.
+
+config SYSRESET_MICROBLAZE
+	bool "Enable support for Microblaze soft reset"
+	depends on MICROBLAZE
+	help
+	  This is soft reset on Microblaze which does jump to 0x0 address.
+
 config SYSRESET_PSCI
 	bool "Enable support for PSCI System Reset"
 	depends on ARM_PSCI_FW
diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile
index 0da58a1cf6..223a0716f0 100644
--- a/drivers/sysreset/Makefile
+++ b/drivers/sysreset/Makefile
@@ -3,6 +3,8 @@
 # (C) Copyright 2016 Cadence Design Systems Inc.
 
 obj-$(CONFIG_SYSRESET) += sysreset-uclass.o
+obj-$(CONFIG_SYSRESET_GPIO) += sysreset_gpio.o
+obj-$(CONFIG_SYSRESET_MICROBLAZE) += sysreset_microblaze.o
 obj-$(CONFIG_SYSRESET_PSCI) += sysreset_psci.o
 obj-$(CONFIG_SYSRESET_SYSCON) += sysreset_syscon.o
 obj-$(CONFIG_SYSRESET_WATCHDOG) += sysreset_watchdog.o
diff --git a/drivers/sysreset/sysreset-uclass.c b/drivers/sysreset/sysreset-uclass.c
index 7e06c3c90a..840eab6b57 100644
--- a/drivers/sysreset/sysreset-uclass.c
+++ b/drivers/sysreset/sysreset-uclass.c
@@ -74,7 +74,23 @@ int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	return 0;
 }
 
+static int sysreset_post_bind(struct udevice *dev)
+{
+#if defined(CONFIG_NEEDS_MANUAL_RELOC)
+	struct sysreset_ops *ops = sysreset_get_ops(dev);
+	static int reloc_done;
+
+	if (!reloc_done) {
+		if (ops->request)
+			ops->request += gd->reloc_off;
+		reloc_done++;
+	}
+#endif
+	return 0;
+}
+
 UCLASS_DRIVER(sysreset) = {
 	.id		= UCLASS_SYSRESET,
 	.name		= "sysreset",
+	.post_bind	= sysreset_post_bind,
 };
diff --git a/drivers/sysreset/sysreset_gpio.c b/drivers/sysreset/sysreset_gpio.c
new file mode 100644
index 0000000000..ed9a49ad08
--- /dev/null
+++ b/drivers/sysreset/sysreset_gpio.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Xilinx, Inc. - Michal Simek
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <sysreset.h>
+#include <asm/gpio.h>
+
+struct gpio_reboot_priv {
+	struct gpio_desc gpio;
+};
+
+static int gpio_reboot_request(struct udevice *dev, enum sysreset_t type)
+{
+	struct gpio_reboot_priv *priv = dev_get_priv(dev);
+
+	/*
+	 * When debug log is enabled please make sure that chars won't end up
+	 * in output fifo. Or you can append udelay(); to get enough time
+	 * to HW to emit output fifo.
+	 */
+	debug("GPIO reset\n");
+
+	/* Writing 1 respects polarity (active high/low) based on gpio->flags */
+	return dm_gpio_set_value(&priv->gpio, 1);
+}
+
+static struct sysreset_ops gpio_reboot_ops = {
+	.request = gpio_reboot_request,
+};
+
+int gpio_reboot_probe(struct udevice *dev)
+{
+	struct gpio_reboot_priv *priv = dev_get_priv(dev);
+
+	/*
+	 * Linux kernel DT binding contain others optional properties
+	 * which are not supported now
+	 */
+
+	return gpio_request_by_name(dev, "gpios", 0, &priv->gpio, GPIOD_IS_OUT);
+}
+
+static const struct udevice_id led_gpio_ids[] = {
+	{ .compatible = "gpio-restart" },
+	{ }
+};
+
+U_BOOT_DRIVER(gpio_reboot) = {
+	.id = UCLASS_SYSRESET,
+	.name = "gpio_restart",
+	.of_match = led_gpio_ids,
+	.ops = &gpio_reboot_ops,
+	.priv_auto_alloc_size = sizeof(struct gpio_reboot_priv),
+	.probe = gpio_reboot_probe,
+};
diff --git a/drivers/sysreset/sysreset_microblaze.c b/drivers/sysreset/sysreset_microblaze.c
new file mode 100644
index 0000000000..514c95817f
--- /dev/null
+++ b/drivers/sysreset/sysreset_microblaze.c
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Xilinx, Inc. - Michal Simek
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <sysreset.h>
+#include <linux/err.h>
+
+static int microblaze_sysreset_request(struct udevice *dev,
+				       enum sysreset_t type)
+{
+	puts("Microblaze soft reset sysreset\n");
+	__asm__ __volatile__ ("	mts rmsr, r0;" \
+				"bra r0");
+
+	return -EINPROGRESS;
+}
+
+static struct sysreset_ops microblaze_sysreset = {
+	.request = microblaze_sysreset_request,
+};
+
+U_BOOT_DRIVER(sysreset_microblaze) = {
+	.id	= UCLASS_SYSRESET,
+	.name	= "mb_soft_reset",
+	.ops	= &microblaze_sysreset,
+};